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Conceptually cpa is interesting, but does it actually work with wsdl
based web services?
Also
don't both parties need to have a CPA defintion? If so, isn't this a huge
overkill for the simple clients invoking a bpel process?
Surely
all that is needed in this case is a very simple "requires/supports" type
mechnism advertised by the process (or wsdl), found in ejb, and
not a complicated negotiation process.
Martin.
David,
I like it.
Those loosely-coupled specs in the ebXML suite certainly enhance reusability
-- something we should keep in mind in our efforts
here.
BPSS includes some simple mechanisms to
specify QoS, in a fashion similar to what I sketched below. Perhaps we can do
a little borrowing, point at CPP/A in a non-normative way, and we can declare
victory. :-)
Cheers,
-Ron
David RR Webber - XML ebusiness
wrote:
Ron,
EXACTLY! This problem has already been solved by the CPA team!!
Why re-invent this? The partner role stuff in BPEL is weak compared
to CPA - so makes sense to upgrade here.
Using your CPA you can point at the BPEL process and specify the
QoS in the CPA. I've also very successfully templated this for
CPA - so that the delivery options and combinations are simply
drag-and-drop options within the CPA wizard UI.
Makes sense for us to liaise with the CPA team to ensure that
a CPA can define BPEL processing adequately.
Looking at it they already have the means provided to point at
a BPEL script. The BPEL engine may need to query the CPA to
determine lowerlevel functionality - and that we may need to
ensure there are the right "slots" for within the CPA schema.
Probably an excellent exercise to go thru anyway - to quantify the
details that are relevant for BPEL.
Thanks, DW.
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Message text written by Ron Ten-Hove
These could be used by the deployer when selecting or creating the
appropriate bindings for the abstract operation "acceptPayment".
This still wouldn't help the interoperability problem -- two deployers
for two different engines that must interoperate must "exchange notes"
to assure compatible bindings are chosen. This starts to become a very
CPA-like exercise.
-Ron
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